雨课堂学堂在线《宏观经济学(东北财经大学)学堂云单元测试考核答案.pdf
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第1题
Inproducingasweater,amanwhoshearssheeppaysafarmer$4fora
sheep.Theshearingshopsellsthewooltoaknittingmillfor$7.The
knittingmillbuysthewoolandmakesitintoafinefabricandsells
ittoasweater-makingfirmfor$13.Thesweater-makingfirms
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